Suppose that a poll taken 10 years ago found that

56%

of parents spank their children. Suppose a recent poll of

250

adults with children finds that

117

indicated that they spank their children. Assuming parents' attitude toward spanking has not changed since the original poll, how many of the

250

parents surveyed would be expected to spank their children? Do the results of the survey suggest that parents' attitude toward spanking may have changed since the original poll? Why?